Y=|x-3|+|x+2|-|x-5| if x<-2

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in